Introducing the Internal Epoxy External PE Coated Steel Pipe with High Resistance to Leakage-a superior steel-plastic composite marvel. This product, innovatively designed by Shandong Donghong Pipe Industry Co., Ltd., boasts unparalleled anti-corrosion features. Our process begins by selecting a meticulously pre-treated steel pipe as the foundational base. On the inner surface, we apply a layer of high-performance fusion bonded epoxy powder, ensuring robust protection. Simultaneously, the outer surface is enveloped in top-quality polyethylene powder. This dual-layered coating not only elevates the durability but also provides exceptional resistance to leakage and environmental degradation.
| Nominal Diameter/ mm |
Inner Coating Layer /mm |
Outer coating layer,mm |
| Ordinary level |
Strengthen level |
| DN ≤65 |
>0.3 |
>0.6 |
>0.8 |
| 65≤DN≤150 |
>0.35 |
>0.8 |
>1.0 |
| 150≤DN≤300 |
>0.35 |
>0.8 |
>1.2 |
| 300≤DN≤800 |
>0.4 |
>1.0 |
>1.3 |
| 800≤DN≤1200 |
>0.45 |
>1.2 |
>1.8 |
| 1200≤DN≤4000 |
>0.45 |
>1.5 |
>1.8 |
Note: This product can be expertly customized to meet the unique requirements and specifications of our valued customers.
1. Unmatched Corrosion Resistance
By harnessing the superior qualities of anti-corrosion materials such as polyethylene and epoxy resin, which are renowned polymer compounds boasting outstanding resistance, our product effectively shields pipelines from detrimental soil and fluid damage. This formidable defense mechanism significantly extends the pipeline's life span.
2. Exceptional Hydraulic Performance
Our innovative design features an impeccably smooth inner wall that is resistant to scaling, ensuring a low friction coefficient and non-adhesive properties. These characteristics enhance the pipeline's conveyance ability while simultaneously minimizing pressure loss and slashing water transmission energy costs.
3. Impeccable Hygiene Standards
The interior epoxy resin coating provides a flawless, scale-resistant surface, ensuring safety and hygiene that complies with the GB/T17219 health standard. This meticulous standard helps prevent pipeline-induced contamination, preserving the pristine quality of water.
4. Superior Coating Adhesion
Our advanced modification process fuses epoxy resin and polyethylene powder with metal to create a robust chemical bond, ensuring exceptional adhesion. The outer polyethylene layer adds resilience, offering superior toughness and impact resistance against scratches, dragging, knocks, and even plant root punctures.
5. Remarkable Longevity
Crafted for endurance, our anti-corrosion steel pipe is built to last, delivering an impressive operational life of 30 to 50 years under typical construction and usage conditions, vastly outperforming conventional steel pipes.
6. Secure and Versatile Connections
Designed for flexibility, our pipes offer an array of connecting methods tailored to diverse environments and pressure needs. Whether using flanges, quick couplings, butt welding, stainless steel linings, or socket connections, each method ensures mature, reliable, and secure connectivity.
1. The excellence of any product begins with its design and manufacturing. At Donghong, we leverage state-of-the-art equipment and integrate years of expertise to ensure that our products are of the highest quality. Our meticulous process control makes us a trusted partner in delivering top-tier products that stand out in the industry.
Anticipating the rise in demand for large-diameter pipelines, Donghong proudly expands its offerings with large-diameter anticorrosion steel pipes crafted to meet international standards. Delivering exceptional quality, our products are engineered to perform beyond expectations.
2. To cater to the diverse requirements of various projects, Donghong has innovated multiple methods for connecting large-diameter anticorrosive steel pipes. Our options include flexible socket connections, butt welding, socket lap welds, ball lap welds, and bespoke bevel forms, offering extensive choices for your project needs. Notably, we pioneered the large-diameter socket flexible connection in China, with a maximum socket caliber reaching 1.8 meters. This innovation was first employed in significant water conservancy projects, establishing Donghong as a trailblazer and leader in the large-diameter steel pipe socket connection domain.
Donghong's extensive capabilities include a dedicated factory for large-diameter, high-pressure pipe fittings. We produce standard and custom pipe fittings tailored to your project's unique requirements and environmental conditions, ensuring a perfect fit every time.
Other connection methods.
| Socket type connection |
Flange Connection |
Clamp Connection |
About us
Donghong (Shandong Donghong Pipe Industry Co., Ltd.) proudly stands as a paragon of excellence in the realm of engineering pipelines, headquartered in the historically rich city of Qufu, China-the revered hometown of Confucius. Since its inception in 1997, Donghong (stock code: 603856) has cultivated a legacy of innovation and leadership as a distinguished manufacturer, service provider, and general contractor in pipeline engineering. Our expertise encompasses four pivotal categories: rainwater and sewage drainage, municipal systems, industrial and mining pipelines, and conduits for national key projects. Marking a significant milestone on November 6, 2017, we proudly became the inaugural engineering composite pipeline manufacturer to be listed on the main board in Shanghai, affirming our role as a trailblazer in the industry.
With a formidable team exceeding 200 dedicated R&D professionals and a remarkable portfolio of over 100 patents, Donghong is committed to spearheading innovation. Our endeavors are fortified by national-level technology platforms including the esteemed national enterprise technology center, CNAS laboratory, academician expert workstation, and postdoctoral workstation. These resources empower us to delve into the digitalization, informatization, and intelligent advancements within pipeline engineering, positioning us as pioneers shaping the future of the industry.
Our company is intricately woven into the fabric of national progress, contributing to both key strategic and essential livelihood projects. As a leader in the engineering pipeline sector, Donghong provides critical infrastructure support to transformative initiatives such as the South-to-North Water Diversion, Hanjinwei, Beijing-Xinjiang Expressway, and the illustrious One Belt, One Road. Our projects also encompass standardized farmland, urban-rural water supply integration, Liren gas, and centralized heating, underscoring our commitment to enhancing national infrastructure and improving quality of life.
Donghong has forged esteemed strategic partnerships with over five elite 5A-level logistics companies, showcasing our extensive expertise in transportation. By seamlessly integrating automobile, railway, port, and shipping logistics, we guarantee unparalleled service regardless of temperature extremes or remote and challenging locations. Our robust, all-encompassing transportation strategy ensures that every shipment is promptly delivered to your doorstep, maximizing efficiency and satisfaction.
1. Is your product meets the international standard ?
Our products have pass CE, BV, ISO and wars certificate, and all figures indicates higher than standard, you can feel free to let us know which national standard you required, we will check or test it for you.
2. What kind of service do you offer ?
As a manufacture fatory, we provide pipe products, pipe fittings, package and shipping; as a professional consulation company we provide project consulting advise, pipe system solutions and design suggestions; as an engineering focused enterprise , we also provide pipeline contractor service and pipe repair service, also can give free maintance guidance.
3. Do you support OEM/ODM service?
Yes, we offer customization in material, specification, logo, package , connection methods andothers. Meanwhile, our professional team can offer solution suggestion for your specified projects, we have successfull cases of that service.
4. What's your terms of payment?
T/T or L/C at sight.
5. How can you gurantee the goods you offered is qualified?
We warmly welcome all customers arrange the visit to our company and see our goods in sight, we can also provide strict test as per customer required before order. Meanwhile, before the bulk production, we can dispatch samples for customer to do their own tests to qualify the products.
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